The best suggestion is to read the documentation, as Cisco has made a fine step-by-step document on how to convert two stand-alone Cat6500 to one VSS system.
In regard to your first reply I'd like to know why you do not recommend vPC on Nx5k connected to a VSS setup? As I understand it two Nx5k running vPC looks like one virtual switch and connecting one switch to one switch means no Spanning Tree loop. Also, all links will be active, as we are talking pt-pt connection between the two switch sets. So please elaborate on your recommendation. Thanks a lot.
Yeah, I've implemented VSS before. The document I was asking about was which specific Nx5k doc they were referring to. I'd also like them to elaborate on how they are talking about connecting the 5ks to the VSS.
I have to make the same design: VSS + 2x N5000. Currently i don't plan to connect the N5000 w. VPC upstream to C6500-VSS (i do plan VPC downstream). I plan to connect each N5000 individually to the VSS chassis with 2x 10G MEC. On the N5000, this is just a local portchannel. Since the connection between the N5000 is only used for VPC and is not considered as a real L2 link, there is no STP loop in this design.
If the downsteam devices alternate their active/passive links between N5-1 and N5-2, both N5s will carry traffic.
PS. i have more confidence in a simple portchannel. You don't want VPC problems (crash/early deployment problems) on the uplinks to VSS, basically isolating your datacenter or risking L2 loops.
PPS. one remark i still have here is: on the N5K, you don't want to connect the uplinks towards VSS on adjacent ports using the same port-group. If the port-group ASIC fails, you will be blackholing traffic in the datacenter as the downstream interfaces will remain up. On C3750 switches, this is solved by Link State Tracking, however this is not supported on N5K, which i really regret. But Cisco says: we don't need Link State Tracking on N5K, as the N5K supports VPc to work around this....However, i feel this is not an excuse to not implement LinkStateTracking in N5K. VPc indeed is usefull if the upstream switches are L2 connected, however, if the upstreams are VSS switches a simple portchannel with link state tracking would suffice and have faster convergence....
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==================== VIC FNIC driver does not support Virtual Volumes (
second level LUN ID ) An enhancement request has been created to track
this feature - CSCux64473 UPDATE - 12-14-2016 We made some traction on
the enhancement request - The Fix is in t...